...Fuli Zhang; Zhaohui Yuan The spring tube is the core component of the hydraulic servovalve, and its stiffness characteristics determine the sensitivity of the servovalve. For the difficulty in measuring and ensuring the stiffness of spring tube in complex structures, based on the principle...

... accurately is very important when designing high performance hydraulic systems. In this study, a measuring device was developed based on the definition of bulk modulus, and the measurement accuracy was estimated. Experiments were carried out using L-HM46 antiwear hydraulic fluid at approximately constant...

... and machine diagnosis tasks. 28 09 2006 10 02 2010 14 04 2010 14 04 2010 angular velocity gears machinery order tracking Kalman filtering measurement Mechanical systems under periodic loading due to rotating operation usually respond in measurements...